html,
body {
    height: 100%;
    margin: 0;
}

* {
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #050a06;
    color: #00ff66;
    font-family: monospace;
}

.box {
    width: min(95vw, 1000px);
    height: 95vh;
    border: 1px solid #00ff66;
    background: #07110a;
    padding: 10px;

    display: flex;
    flex-direction: column;

    overflow: hidden;
    min-width: 0;
    min-height: 0;
}

canvas {
    flex: 1;
    width: 80%;
    height: 100%;
    max-width: 100%;
    border: 1px solid #00ff66;
    image-rendering: pixelated;
    margin-left: auto;
    margin-right: auto;
}

button,
input {
    margin-bottom: 10px;
    max-width: 100%;
    border-style: none;
}

button {
    background-color: #00ff66;
    color: black;
    height: 30px;
}